I built one. great. 50-amp service, water. did not put in a dump station, that would have been a good idea. floor drains, sloped floor so i can wash as needed. lots of overhead lights makes it nice to see. my coach is only 36ft but made it 55 just in case we upgrade. the slide by doors could open a little wider but i have plenty of room inside to put out the slides. no heat but i just turn on the heat in the coach, and i do winterize the water system good luck!